Ditto above and in addition I would upgrade your pad to at least an R12 if you go with wider wheels. I'm running 18x10 with 295/40-18 200TW tires with R12s and feel I should upgrade to R16s.
My BFGs lasted approximately 14 minutes per session last weekend before turning greasy.
So I upgraded to the 285/35 Goodyear Supercar 3. We'll see how long they hold up at VIR this coming weekend...
If it's good enough for the 1LE it's got to be good enough for me.